DB9 9-Pin Solderless Connector RS232 RS485 Adapter Board

DB9 9-Pin Solderless Connector — RS232 / RS485 / RS422 Adapter Board

Upgrade your serial communication setup with this versatile DB9 Solderless Connector Adapter Board. Designed for RS232, RS485, and RS422 serial port applications, this adapter board supports both male and female plug configurations — no soldering required for wiring termination. The screw-terminal or nut-terminal design makes it easy to connect, adjust, and re-use across multiple projects.

Compatible with a wide range of industrial and hobbyist devices including PLCs, touch screens, programmers, and data converters, this DB9 adapter board is an essential component for anyone working with COM port serial communication.

Key Features

• Universal Compatibility: Works with RS232, RS485, and RS422 serial communication standards
• No-Solder Wiring: Screw-clamp or nut-terminal connections — fast and tool-friendly
• Male & Female Options: Available in DB9 Screw Female, DB9 Screw Male, DB9 Nut Female, and DB9 Nut Male variants
• 9-Pin Two-Row Layout: Full DB9 / D-Sub pinout with all standard signal lines accessible
• Eco-Friendly Construction: Built with environmental protection engineering plastic
• CE Certified: Meets CE compliance standards for low-voltage electronics
• Wide Voltage Range: Supports 5V, 12V, 20V, and 30V operating environments
• Made in China

Full DB9 Pinout Reference

1. DCD — Data Carrier Detect
2. RXD — Received Data
3. TXD — Transmitted Data
4. DTR — Data Terminal Ready
5. GND — Signal Ground
6. DSR — Data Set Ready
7. RTS — Request to Send
8. CTS — Clear to Send
9. RI — Ring Indicator

Specifications

Common Applications

• PLC (Programmable Logic Controller) wiring
• Industrial touch screen serial connections
• Data converters and protocol adapters
• Programmer and UART serial communication
• DIY electronics, maker boards, and prototyping

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For further reference on serial communication standards and electrical connector safety, visit the National Institute of Standards and Technology (NIST), a leading authority on electronics standards and measurement.

Frequently Asked Questions

Q: What serial communication protocols are compatible with this DB9 adapter board?

A: This DB9 solderless connector adapter board is fully compatible with RS232, RS485, and RS422 serial communication protocols. It is suitable for use with PLCs, touch screens, data converters, programmers, and other COM port serial devices.

Q: Do I need soldering skills to use this DB9 connector?

A: No. This adapter board is designed with screw-terminal or nut-terminal connections, allowing you to securely fasten wires without any soldering. Simply loosen the screw, insert your wire, and tighten — making it ideal for field wiring and quick prototyping.

Q: What is the difference between the DB9 Screw and DB9 Nut variants?

A: The DB9 Screw variant uses a flat-blade or Phillips screw to clamp down the wire, while the DB9 Nut variant uses a nut-and-bolt style terminal for a more secure mechanical grip. Both variants are available in male and female configurations to match your specific application.

Q: Is this DB9 adapter CE certified?

A: Yes. This product carries CE certification and complies with EU Low Voltage Directive (LVD) requirements for devices operating below 50Vac or 75Vdc.